Electronic cigarette



FIG. 1 is a perspective view of an electronic cigarette of the present design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings depict portions of the electronic cigarette that form no part of the claimed design. 

CLAIM The ornamental design for an electronic cigarette, as shown and described. 